JP2008062143A - Catalyst unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a catalyst unit which has a catalysis capacity required in quantity, is used for treating gas and the form of which is fixed. <P>SOLUTION: The catalyst unit is provided with: a catalytic body which has air permeability and the form of which is fixed/blocked; and a catalyst holding frame body for holding a plurality of the catalytic bodies in such an assembled state that the plurality of the catalytic bodies are arranged as one assembly to two-dimensionally block a flow passage of the gas to be treated or in such a layered/assembled state that the assemblies of the catalytic bodies are arranged to be superposed on one another in two or more stages in the flow direction of the gas to be treated. The catalytic body, the assembly or the catalyst holding frame body are assembled as separable units so that a catalyst can be exchanged. The catalytic bodies of the assembled state are compressed by using a bolt fastening means and unitized in a highly compacted state. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a catalyst unit used when a gas is processed using a catalyst.

In order to maximize the catalytic area by maximizing the contact area with the gas and maximizing the catalytic action capacity, the conventional gas processing catalyst is packed into a suitable container after being finely divided into a powder or granular form. A technique such as installing in the middle of a gas flow path so as to block the flow path has been adopted.

However, with such conventional methods, the capacity and shape of the catalyst container must be designed according to the specific shape and environment of the gas to be treated and the installation site of the catalyst container in the gas flow path. A general-purpose catalyst container having a predetermined capacity and shape has not been realized.

In addition, since the catalyst stored in the container is miniaturized, it is difficult to standardize in advance the amount of catalyst necessary to give the catalyst container the desired catalytic action capacity and the arrangement form thereof. There was the inconvenience of having to design each time according to the environment of the installation site.

The present invention has been made for the purpose of solving the above-mentioned problems, and a troublesome design is realized by standardizing a catalyst having a certain amount of catalytic action capacity and unitizing the required number of the standardized catalysts. It is an object of the present invention to provide a catalyst unit for gas processing having a required amount of catalytic action by selecting the apparent number and the laminated form.

The invention of the catalyst unit according to claim 1 is such that the catalyst body that is formed into a regular block with air permeability and the plurality of catalyst bodies are cut off from the flow path of the gas to be treated. A catalyst holding frame that holds the aggregated state in which the aggregated state is disposed, or the aggregated state in which the aggregated state is arranged in a plurality of stages in the flow-down direction of the gas to be treated. Alternatively, the catalyst can be exchanged in units of aggregates or catalyst holding frames.

  According to a second aspect of the present invention, in the catalyst unit according to the first aspect, the container body includes a gas inlet and a gas outlet that are connectable to the gas flow path.

  A third aspect of the present invention is the catalyst unit according to the first or second aspect, wherein the catalyst unit, the assembly, or the catalyst holding frame unit is configured to be inserted into and removed from the catalyst holding frame unit. .

  According to a fourth aspect of the present invention, in the catalyst unit according to any one of the first to third aspects, the gas inflow surface and the gas outflow surface are respectively provided on the gas inflow surface side and the gas outflow surface side of the catalyst holding frame. A grid provided with an outer peripheral edge corresponding to the outer peripheral edge of the gas and a crosspiece arranged so as to cover a tangent line between the catalyst bodies of the aggregate that appears so as to divide each surface of the gas inflow surface and the gas outflow surface It has a shape frame.

  According to a fifth aspect of the present invention, in the catalyst unit according to the fourth aspect, the outer peripheral edge of the lattice-shaped frame is circular, square or other desired shape according to the cross-sectional shape of the gas flow path. To do.

According to a sixth aspect of the present invention, in the catalyst unit according to the fourth or fifth aspect, the crosspieces of the lattice-shaped frame are arranged on the gas inflow surface and the gas outflow surface according to the shape of the catalyst body formed into a regular block. It is characterized by being a square, a circle or other shapes formed along the tangent line between the catalyst bodies of the aggregate that appears so as to divide each surface.

  The invention according to claim 7 is the catalyst unit according to any one of claims 4 to 6, wherein the lattice frame on the gas inflow surface side and the lattice frame on the gas outflow surface side are outside of the lattice frames. It is characterized by comprising a plurality of connecting members spanned between the peripheral portions, and bolt fastening means for detachably connecting the both end sides of each connecting member and the outer peripheral portion.

  The invention according to claim 8 is the catalyst unit according to any one of claims 4 to 7, wherein the lattice frame on the gas inflow surface side and the lattice frame on the gas outflow surface side have the same or symmetrical shape. It is characterized by being arranged parallel to the back-to-back state.

According to a ninth aspect of the present invention, in the catalyst unit according to the seventh or eighth aspect, the bolt tightening means is provided on the lattice frame side bolt hole provided on the lattice frame side and the lattice frame side bolt hole. A connecting member side bolt hole provided on the corresponding connecting member side, and a fastening bolt that is passed through both bolt holes of the grid frame side bolt hole and the connecting member side bolt hole. Is larger than the diameter of the fastening bolt that is inserted into the hole, and the fastening bolt in the initial stage before bolt tightening is obliquely penetrated through the overlapped bolt holes so that the axis of the hole is not aligned. As the bolt is tightened toward the final stage of tightening, the fastening bolt is tilted in a direction that coincides with the axis of both bolt holes,
The grid frame that receives pressure by the tilting operation of the fastening bolt compresses the aggregate filled between the grid frames to unitize the catalyst body into a highly concentrated state.

  A tenth aspect of the present invention is the catalyst unit according to any one of the seventh to ninth aspects, wherein the plurality of connecting members are a single cylindrical body that covers the outer peripheral surface of the aggregate in the aggregated state or the stacked aggregated state. It is characterized by that.

  The invention of claim 11 is the catalyst unit according to claim 7 or claim 8, wherein the plurality of connecting members are on the outer peripheral surface side of the cylindrical body covering the outer peripheral surface of the assembly in the aggregated state or the stacked aggregated state. It is arranged in that.

  According to a twelfth aspect of the present invention, in the catalyst unit according to any one of the ninth to eleventh aspects, the bolt fastening means may be either a lattice frame on the gas inflow surface side or a lattice frame on the gas outflow surface side. It is provided on one of the lattice frames.

A thirteenth aspect of the present invention is characterized in that, in the catalyst unit according to any one of the first to twelfth aspects, the regular block-shaped catalyst body is three-dimensional.

  According to a fourteenth aspect of the present invention, in the catalyst unit according to any one of the first to thirteenth aspects, the catalyst body has a ceramic corrugated honeycomb structure.

  According to a fifteenth aspect of the present invention, in the catalyst unit according to any one of the first to fourteenth aspects, the catalyst body is an ozone decomposition catalyst.

According to the first to fifteenth aspects, since the catalyst is formed into a regular block, the unit of the standardized catalyst (hereinafter referred to as a catalyst body or a regular catalyst body) (for example, per one) It is possible to form it by assuming an appropriate amount (number) and form (lamination form) according to the gas flow rate of the processing object, by simply obtaining in advance the catalytic ability of the process, and it is not always necessary to perform troublesome design calculations. do not do.
And since it can unitize easily, the catalyst unit for gas processing provided with the required catalytic action capability can be provided quickly and easily.
In addition, since it is standardized, the handling of the catalyst as a unit or assembly or catalyst holding frame as a unit, such as replacement, transportation, storage, etc., is extremely compared to the handling in the conventional powder or granular state. It can be done conveniently.

  According to the invention of claim 2, since the container main body in which the catalyst holding frame is accommodated includes the separable gas inlet and the gas outlet, the gas inlet according to the newly installed gas passage or the existing gas passage. By replacing the gas outlet and the gas outlet, the required catalyst unit can be easily installed.

  According to the invention of claim 3, it is possible to facilitate the replacement operation of the catalyst with the catalyst body, the assembly, or the catalyst holding frame as a unit.

  According to the fourth to sixth aspects of the present invention, in any case, the catalyst holding frame body has the outer peripheral edge of the surface on the gas inflow surface side or the gas outflow surface side, and the catalyst bodies are in contact with each other. Since the tangent is covered with the crosspiece, the gas flow rate that does not pass through the aggregate can be minimized, and the gas processing capacity can be increased.

  According to the seventh to twelfth aspects of the present invention, in any case, a plurality of standardized catalyst bodies can be easily unitized as an aggregate in the required number and form on the catalyst holding frame by the bolt fastening means. can do.

According to the ninth aspect of the present invention, the assembled state can be obtained simply by passing the bolts diagonally through a pair of bolt holes provided in association with each other in the grid frame and the connecting member constituting the catalyst holding frame body, and tightening appropriately. The catalyst body can be unitized in a high density state without being damaged.

  In addition, it is possible to configure by simply forming a 2-bolt hole larger than the diameter of the fastening bolt using a commercially available fastening bolt that is easily available and inexpensive, and no special mechanism or device is required.

Hereinafter, embodiments of the present invention will be described with reference to an ozone gas decomposition catalyst unit shown in FIGS.
1 is an external perspective view of a catalyst unit for decomposing ozone gas, FIG. 2 is an exploded perspective view of the catalyst unit of FIG. 1, FIG. 3 is an exploded perspective view of the catalyst body and the catalyst holding frame body of FIG. FIG. 5 is a cross-sectional view taken along line AA of FIG. 4, FIG. 6 is a front view of the gas inflow side of the stacked catalyst bodies, FIG. 7 is a partially enlarged view of FIG. 9 is an explanatory view of the bolt hole in FIG. 8 in the axial direction, FIG. 10 is an enlarged explanatory view of the bolt hole in FIG. 9, FIG. 11 is an explanatory view after tightening the bolt in FIG. 11 is an explanatory view of the bolt hole in the axial direction, and FIG. 13 is an enlarged explanatory view of the bolt hole in FIG.

1 and 2, reference numeral 1 denotes a container body, 2 denotes a gas inlet to the container body 1, and 3 denotes a gas outlet from the container body 1.
The container body 1 is provided with a required catalytic capacity by preparing in advance a plurality of types of gas inlets 2 and gas outlets 3 having a diameter corresponding to the diameter of a gas flow path (not shown). The container body 1 can be connected to the target gas flow path regardless of the diameter.

3 to 7, a required number of catalyst bodies (standard catalyst bodies) 4 that are formed into a desired three-dimensional shape having a vertical and horizontal air permeability are formed in the container body 1. Are accommodated as an assembly 40 arranged in the. The regular block formation of the catalyst may be carried out using an appropriate conventional means.
Further, the catalyst body 4 of the embodiment is an ozone decomposition catalyst and has a ceramic corrugated honeycomb structure, but the catalyst body 4 is naturally selected according to the gas to be treated, and its structure is also arbitrary.

The catalyst unit 10 has a collective state in which a plurality of catalyst bodies 4 are arranged so as to block the gas flow paths in a plane with respect to a flow path (not shown) of the gas to be processed, or the aggregate Catalyst holding that holds the assembly 40 in a stacked assembly state in which the state is arranged in a plurality of stages in the flow-down direction of the gas to be processed, with the fastening bolt means 55 described later in the assembled form. And a frame 50.
The catalyst of the catalyst unit 10 can be easily replaced with the catalyst body 4 formed into a regular block as a unit, or with the unitized assembly 40 and the catalyst holding frame 50 as a unit.

The catalyst holding frame 50 according to the embodiment is applied to the lattice frame 51 applied to the gas inflow surface side of the assembly 40 (hereinafter also referred to as a gas inflow surface side lattice frame) and to the gas outflow surface side. A plurality of grid frames 52 (hereinafter also referred to as gas outflow surface side grid frames) and outer peripheral edge portions 511 and 522 of both grid frames 51 and 52 across the gas flow downward direction (cleaning direction). The connecting member 53 is provided with bolt fastening means 55 for detachably connecting between both end sides of the connecting member 53 and the outer peripheral edge portions 511 and 522.

In this embodiment, the gas inflow surface side lattice frame 51 and the gas outflow surface side lattice frame 52 are substantially the same, and are parallel to each other in a symmetrical shape in back-to-back, that is, the gas flow path is blocked. Are arranged so as to overlap in parallel with the assembly 40 therebetween (with an installation space).
Any of the lattice frames 51 and 52 is an outer peripheral edge corresponding to the outer peripheral edge of the gas inflow surface or the gas outflow surface, respectively, according to the gas inflow surface side and the gas outflow surface side of the catalyst holding frame 1 (the assembly 40). The cross section 56 is arranged so as to cover the tangents 54 between the catalyst bodies appearing on the surfaces so as to divide the portions 511 and 522 and the gas inflow surface or the gas outflow surface. The leaked gas flows down to the side, and the gas is blocked from flowing into the gap between the catalyst bodies 4.

In the catalyst unit of this embodiment, the outer peripheral edge portions 511 and 522 of the lattice frames 51 and 52 on the gas inflow surface and the gas outflow surface are rectangular according to the cross-sectional shape of the gas flow path.
However, as described above, this is to prevent the leaked gas from flowing down to the outer peripheral side of the assembly 40, so that the lattice frames 51, 52 of the lattice frames 51, 52 depend on the specific cross-sectional shape of the gas flow path. Therefore, the shape is not limited to a square, and may be a circle or other desired shape (not shown).

Further, the crosspieces 56 of the lattice frames 51 and 52 also follow tangents between the catalyst bodies 4 appearing on the gas inflow or outflow surface of the assembly 40 so as to divide the gas inflow surface and the gas outflow surface. It is a square formed.
However, as described above, this is to prevent gas from flowing from the tangent line 54 between the catalyst bodies, that is, the gap between the catalyst bodies 4 constituting the assembly 40. Depending on the shape of the medium 4 and the aggregate form thereof, the cross-sectional shape of each specific gas flow path may be set so as to close the gap between the catalyst bodies. It may be a shape (not shown).

Next, the bolt fastening means 55 will be described with reference to FIGS.
First, as shown in FIG. 8, the bolt fastening means 55 of this embodiment includes bolt holes 512 (hereinafter referred to as grid frame side bolt holes) provided on the outer peripheral edge 511 (522) side of the grid frame 51 (52). And the bolt holes 530 (hereinafter also referred to as connecting member side bolt holes) in which both ends of the connecting member side 53 are respectively provided in the ring corresponding to the respective grid frame side bolt holes 530. The bolt holes 512 and 530 of the bolt hole 512 and the bolt hole 530 are provided with fastening bolts 57 that are passed through at least before loosely fitting.

Each of the corresponding pair of bolt holes 512 and 530 is formed larger than the diameter of the fastening bolt 57 inserted through the holes, and the bolt fastening means shown in FIGS. 8 to 10 before bolt fastening. In the initial stage of tightening by 55, the fastening bolt 57 in the state of being simply inserted is shifted in the gas flow downward direction, that is, in the stacking direction of the catalyst body 4 in the center of the holes 512 and 530 of each other. The bolt holes 512 and 530 that are overlapped with each other are inserted diagonally, that is, along the axis of the hole that is inclined over the holes 512 and 530 that are offset from the center, Make up.

In this case, the positions of the holes of the bolt holes 512 and 530 are shifted before the densification of the catalyst body 4 and the assembly 40 accommodated between the lattice frames 51 and 52 by compression by bolt tightening described later. In a state where the capacity, that is, the capacity in which the aggregate 40 is simply accommodated in the catalyst holding frame 53, the bolt holes 512 and 530 do not coincide with each other, and the position is shifted.
In FIG. 8, the positional shift is shifted in such a manner that the grid frame side bolt hole 512 is upstream of the gas flow path and the connecting member side bolt hole 530 is downstream of the gas flow path.

When the fastening bolt 57 is tightened from the initial stage, as shown in FIGS. 11 to 13, the axis of the holes of both the bolt holes 512 and 530 is changed to the both holes as the fastening bolt 57 is screwed. It acts (tilts) so as to be vertical to the surfaces 512 and 530 of the lens.
The force action of the fastening bolt 57 that rises vertically by this tightening gradually tilts the fastening bolt 57 in a direction that coincides with the axis of both bolt holes 512 and 530 toward the final stage of fastening. The aggregated catalyst body 4 (aggregate 4) filled between the grid frames 51 and 52 is compressed by the grid frames 51 and 52 that receive the action (pressure) in the direction in which the axes coincide with each other by the tilting operation of Thus, the catalyst body 4 is unitized into a highly concentrated state.

In other words, this action eventually compresses the assembly 40 in the stacking direction (the gas flow downward direction) to increase the density of the stack structure, and the tangent line 54 between the catalyst bodies 4 constituting the assembly 40. Eliminate gaps in etc. Thereby, a catalyst can be made to act on all the gas which distribute | circulates without leaking.

  8 and 11, reference numeral 11 in the figure is a cover panel of the container wood 1 that covers the outer peripheral surface of the assembly 40, and in this embodiment, a relatively thin cover panel 11 is used. Since the grid frames 51 and 52 arranged before and after the gas flow path (upstream and downstream) are not strong enough to be used as a connecting member, a connecting member 53 is used separately from the cover panel 11. However, if the cover panel 11 is made as durable as the connecting member 53, the cover panel 11 can also be used as the connecting member 53.

Thus, in the case of sharing, the plurality of connecting members 53 are not required, the cover panel 11 covering the outer peripheral surface of the aggregate 40 in the aggregated state or the stacked aggregated state becomes a single cylindrical body, and the catalyst holding frame body Also 1
The holes 530 provided at both ends in the longitudinal direction of the connecting member 53 are directly opened (not shown) at corresponding positions on the cover panel 11 (the above-described cylindrical body).

In this embodiment, since the thin panel having no durability is used as the cover panel 11, the panel 11 is provided with a through hole (FIG. 8) through which the fastening bolt 57 is inserted, and the connecting member 53. Is appropriately disposed on the outer peripheral surface side of the panel 11 as shown in the figure.

  Moreover, as for the bolt tightening means 55 in this embodiment, only a part of the bolt tightening means 55 on the one side of the lattice frame 51 has been described, but other bolt tightening means 55 and the bolt tightening means 55 on the rear frame 52 side. The same applies to (FIG. 4).

In this embodiment, the bolt fastening means 55 (FIG. 4) is provided on both the lattice frames 51 and 52, respectively, but only on either one of the frames (51 or 52) side. The frame (51 or 52) on the non-arranged side can be integrated with one end side of the connecting member 53 (or the cylindrical body).

  As described above, the present invention has been described with reference to the catalyst unit for the catalyst body for ozonolysis as described above. However, the present invention is not limited to this ozonolysis, and can be widely applied to catalyst units for gas treatment by catalysis. .

It is an external appearance perspective view of a catalyst unit. It is a disassembled perspective view of a catalyst unit. It is a disassembled perspective view of a catalyst body and a catalyst holding frame. It is a side view of a catalyst holding frame. It is the sectional view on the AA line of FIG. It is a front view of the gas inflow side of the laminated catalyst body. FIG. 7 is a partially enlarged view of FIG. FIG. 6 is a partially enlarged explanatory view of FIG. 5. It is explanatory drawing of the axial direction of the bolt hole of FIG. FIG. 10 is an enlarged explanatory view of the bolt hole of FIG. 9. It is explanatory drawing after the bolt fastening of FIG. It is explanatory drawing of the axial direction of the bolt hole of FIG. It is expansion explanatory drawing of the bolt hole of FIG.

Explanation of symbols

1 Container body 2 Gas inlet 3 Gas outlet
4 Catalyst body
10 Catalyst unit 11 Cover panel (tubular body)
40 aggregates
50 Catalyst holding frame
51 Lattice frame (gas inflow side)
511 Outer peripheral edge 512 Bolt hole (Lattice frame side)
52 Lattice frame (gas outflow side)
522 Outer peripheral edge
53 connecting member 530 bolt hole (connecting member)
54 Tangent
55 Bolt tightening means
56 Crosspiece 57 Fastening bolt

Claims (15)

A catalyst body that is formed into a fixed block with air permeability, and a collective state in which a plurality of the catalyst bodies are arranged so as to block the flow path in a plane with respect to the flow path of the gas to be treated, or And a catalyst holding frame that holds the aggregate in the stacked aggregate state arranged so that the aggregated state is stacked in a plurality of stages in the flow-down direction of the gas to be treated, and the catalyst body or the aggregate or the catalyst holding frame unit As a catalyst unit, the catalyst can be exchanged.   2. The catalyst unit according to claim 1, wherein the container main body includes a gas inlet and a gas outlet that can be connected to the gas flow path so as to be separable from each other.   3. The catalyst unit according to claim 1, wherein the catalyst unit is configured to be freely inserted into and removed from the container body in units of a catalyst body, an assembly, or a catalyst holding frame.   On the gas inflow surface side and gas outflow surface side of the catalyst holding frame body, the outer peripheral edge portion corresponding to the outer peripheral edge of the gas inflow surface and the gas outflow surface and the respective surfaces of the gas inflow surface and the gas outflow surface are divided. 4. The catalyst unit according to claim 1, further comprising a grid-like frame provided with a crosspiece disposed so as to cover a tangent line between the catalyst bodies of the aggregate appearing in the assembly. .   5. The catalyst unit according to claim 4, wherein the outer peripheral edge of the lattice-shaped frame has a circular shape, a square shape, or other desired shape according to a cross-sectional shape of the gas flow path.   The crosspieces of the grid frame are formed along the tangent line between the catalyst bodies of the assembly that appears to divide each surface of the gas inflow surface and gas outflow surface according to the shape of the catalyst body that is made into a regular block. 6. The catalyst unit according to claim 4, wherein the catalyst unit has a square shape, a circular shape, or other shapes.   The grid frame on the gas inflow surface side and the grid frame on the gas outflow surface side include a plurality of connecting members that span between the outer peripheral edge portions of both grid frame frames, both end sides of each connecting member, and the outer peripheral edge portion. The catalyst unit according to any one of claims 4 to 6, further comprising a bolt tightening means for detachably connecting the two.   The lattice frame on the gas inflow surface side and the lattice frame on the gas outflow surface side have the same or symmetrical shape and are arranged in parallel in a back-to-back state. The catalyst unit according to any one of the above. The bolt tightening means includes a grid frame side bolt hole provided on the grid frame side, a connection member side bolt hole provided on the connection member side corresponding to the grid frame side bolt hole, and the grid frame side A fastening bolt passed through both the bolt hole and the bolt hole of the connecting member side bolt hole;
Both the bolt holes are formed larger than the diameter of the fastening bolt inserted into the hole,
The fastening bolt in the initial stage before bolt tightening is obliquely penetrated through both bolt holes that are shifted and overlapped so that the axis of the hole does not match,
As the bolt is tightened toward the final stage of tightening, the fastening bolt is tilted in a direction coinciding with the axis of both bolt holes,
8. The grid frame that receives pressure by the tilting operation of the fastening bolt compresses the aggregate disposed between the grid frames to unitize the catalyst body in a highly concentrated state. Or the catalyst unit of Claim 8.   The catalyst unit according to any one of claims 7 to 9, wherein the plurality of connecting members are one cylindrical body that covers an outer peripheral surface of the aggregate in the aggregated state or the stacked aggregated state.   9. The catalyst according to claim 7, wherein the plurality of connecting members are disposed on the outer peripheral surface side of the cylindrical body that covers the outer peripheral surface of the aggregate in the aggregated state or the stacked aggregated state. unit.   The bolt tightening means is provided in any one of the lattice frame on the gas inflow surface side and the lattice frame on the gas outflow surface side. The catalyst unit described. The catalyst unit according to any one of claims 1 to 12, wherein the fixed block catalyst body is a solid body.   The catalyst unit according to any one of claims 1 to 13, wherein the catalyst body has a ceramic corrugated honeycomb structure. 15. The catalyst unit according to claim 1, wherein the catalyst body is an ozone decomposition catalyst.

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